OPEN GRADED ASPHALT FRICTION COURSE, PERMEABLE ASPHALT DRAINAGE COURSE, AND ULTRA-THIN BONDED WEARING COURSE:

(4-17-12) / 609 / SP6 R62

When producing and constructing open graded asphalt friction course, permeable asphalt drainage course, and ultra-thin bonded wearing course revise the 2012Standard Specifications as follows:

Page 6-10, Subarticle 609-6(B) Required Sampling and Testing Frequencies, delete the third paragraph and replace with the following:

Sample and test the completed mixture from each mix design per plant per year at the following minimum frequency during mix production:

Accumulative Production Increment / Number of Samples per Increment
500 tons / 1

Page 6-10, Subarticle 609-6(C) Control Charts, delete the fourth paragraph and replace with the following:

Record the following data on the standardized control charts and in accordance with the requirements of Section 7.4 of the HMA/QMS Manual:

(a) Aggregate Gradation Test Results:

1. 12.5 mm (Types P57 & FC-2 Mod. Only)

2. 9.5 mm (Excluding Type P57)

3. 4.75 mm

4. 2.36 mm

5. 0.075 mm Sieves

(b) Binder Content, %, Pb

Page 6-11, Subarticle 609-6(D) Control Limits, Table 609-1 CONTROL LIMITS, replace with the following:

TABLE 609-1
CONTROL LIMITS
Mix Control Criteria / Target Source / Moving Average Limit / Individual Limit
12.5 mm Sieve (Types P57 & FC-2 Mod) / JMF / ± 4.0 / ± 8.0
9.5 mm Sieve (Excluding Type P57) / JMF / ± 4.0 / ± 8.0
4.75 mm Sieve / JMF / ± 4.0 / ± 8.0
2.36 mm Sieve / JMF / ± 4.0 / ± 8.0
0.075 mm Sieve / JMF / ± 1.5 / ± 2.5
Binder Content / JMF / ± 0.3 / ± 0.7
TSR (Ultra-thin Only) / Min. Spec. Limit / - / - 15%

Page 6-12, Subarticle 609-6(F) Allowable Retesting for Mix Deficiencies,
Table 609-2 RETEST LIMITS FOR MIX DEFICIENCIES, replace with the following:

TABLE 609-2
RETEST LIMITS FOR MIX DEFICIENCIES
Property / Limit
% Binder Content / by more than ± 1.0%
12.5 mm Sieve (Types P 57 & FC-2 Mod) / by more than ± 9.0%
9.5 mm Sieve (Excluding Type P 57) / by more than ± 9.0%
4.75 mm sieve / by more than ± 9.0%
2.36 mm sieve / by more than ± 9.0%
0.075 mm sieve / by more than ± 3.0%
TSR (Ultra-thin only) / by more than -15%
from Specification limit

Page 6-17, Subarticle 609-9(C) Limits of Precision, Table 609-3 LIMITS OF PRECISION FOR TEST RESULTS, replace with the following:

TABLE 609-3
LIMITS OF PRECISION FOR TEST RESULTS
Mix Property / Limits of Precision
12.5 mm Sieve (Types P 57 & FC-2 Mod. Only) / ± 6.0%
9.5 mm Sieve (Excluding Type P 57) / ± 5.0%
4.75 mm Sieve / ± 5.0%
2.36 mm Sieve / ± 5.0%
0.075 mm Sieve / ± 2.0%
Asphalt Binder Content / ± 0.5%
TSR (Ultra-thin HMA Only) / ± 15.0%